Taper a Time Series by a Cosine Bell

Description

Apply a cosine-bell taper to a time series.

Usage

spec.taper(x, p = 0.1)

Arguments

x

A univariate or multivariate time series

p

The proportion to be tapered at each end of the series,
either a scalar (giving the proportion for all series)
or a vector of the length of the number of series (giving the
proportion for each series..

Details

The cosine-bell taper is applied to the first and last p[i]
observations of time series x[, i].